Electric bell.



Patented Jan. 28, 1919.

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UNITED STAES PATENT OFFICE.

I CARL J". SCHWARZE, 0F ADRIAN, MICHIGAN, ASSIGNOR TO SCHWARZE ELECTRICCOMPANY, OF ADRIAN, MICHIGAN, A CORPORATION OF MICHIGAN.

ELECTRIC BELL.

Specification of Letters Patent.

Patented Jan. 28, 1919.

Application filed September 1, 1917. Serial No. 189,258.

To all whom it may concern Be it known that I, CARL J. SoHwARzn, acitizen of the United States of America, residing at Adrian, in thecounty of Lenawee and State of Michigan, have invented certain new anduseful Improvements in Electric Bells, of which the following is aspecification, reference being had therein to the accompanying drawings.

The invention relates to electric bells and has for its object theobtaining of a simple and inexpensive construction to manufacture. Tothis end the invention comprises the novel construction as hereinafterset forth.

In the drawings:

Figure 1 is an elevation of the bell with the cover removed;

Fig. 2 is a vertical central section through the bell;

Fig. 3 is a section on line 3-3 of Fig. 2.

A is the supporting base which is formed of pressed sheet metal having abody portion B with a recess C in its upper face and an extension D atone end thereof. E is the bell mounted upon the extension D by means ofa. bracket F bent from a strip of metal into substantially U-form, oneleg thereof being connected by the screw G to the bell and the oppositeleg connected by the screw H to the base, a projecting lug I engaging aslot J in the base serving to hold the bracket from turning. Theelectro-magnet K is formed of two spools upon core members L, which coremembers are attached at one end to a flange M of a Z-shaped sheet-metalmember M' the central portion of the 2 being attached by a screw N tothe base in the depression C thereof, and the opposite end portion M ofthe Z paming through an aperture 0 in the base. The opposite ends of thecore members L are mechanically connected by a member P which is ofnon-magnetic material to avoid short circuiting the magnetism. Q is astriker-bar extending centrally between the magnet spools K and slidablyengaging the flange M and non-magnetic bar P. R is an armature platesecured to the striker-bar Q and extending into proximity to thepole-pieces of the magnet. The armature R has an outwardly-extendingportion R which is returnbent at B S is a resilient member clamped tothe flange M of the Z-bar member and T is a cooperating member alsoclamped to said flange and insulated therefrom by suitable material U.The members S and T have cooperating contacts fixed thereon whichoperate as a cireuit interrupter.

In operation, when current is passed through the magnet coils thearmature will be attracted, which will cause the strikerbar Q, todeliver a blow upon the bell. This operation will also cause thereturnbent portion R of the armature to strike the member S, separatingthe contacts thereon and breaking the circuit. This in turn willdeenergize the magnet and permit the striker and armature to drop bygravity to their normal position. The only parts which are actuated arethe striker-bar and the armature, and as these are comparatively smallin mass very little power is requlred.

To obtain the necessary length of the member S without increasing theheight of the base the depressed portion is formed in said base, andfurthermore this is apertured to permit the shank end of the vibrator tomove inward thorethrough. Almost all of the parts. comprising theconstruction are made from stampings and the work of assembling theseparts is quickly performed.

What I claim as my invention is:

1. In an electric bell, the combination of a base formed of pressedsheet-metal with an extension at one end thereof, a depression and amarginal flange extending therearound, a bell mounted on said extension,a U-shaped member forming a mounting for said bell and having an endportion thereof engaging a slot in said extension to prevent turning, anelectro-magnet mounted in the depression, a striker slidable axially ofsaid magnet, and an armature connected to said striker and extending inoperative relation with the magnetic poles.

2. An electric bell, comprising a base formed of pressed sheet-metalwith a substantially rectangular body portion having a depressioncentrally thereof and with an extension at one end of said body portion,a bell mounted at the end of said extension, an electro-magnet mountedin said depression, a striker arranged to move axially of said magnet,an armature secured to said striker and extending into operativerelation to the poles of the magnet, a circuit-breaker extending throughan aperture in the base,

and a flange for supporting said circuit breaker also extending throughsaid aperture.

3. In a bell, a base member formed of pressed sheet-metal having adepression centrally thereof, a magnet comprising a Z- shaped memberhaving the central portion thereof secured to the bottom of saidrecessed portion, magnetic core pieces secured to an upwardly-extendingflange of said Z-member, a non-magnetic bridge between the opposite endsof said core members, a striker slidable in said flange and non-magneticbridge, an armature rigidly mounted on said striker, and acircuit-breaker in operative relation to said striker.

4. In an electric bell, the combination with a pressed sheet-metal basemember, of a magnet comprising a Z-shaped member, parallelly-arrangedcore members mounted on one flange of said Z-shaped member, anon-magnetic bridge between the opposite ends of said core members, astriker mounted in said non-magnetic bridge and flange of said Z-member,an armature mounted on said striker arranged outside of said nonmagneticbridge, a returnbent flange on said armature, and a resilientcircuit-breaker extending between said armature and the returnbentportion thereof, the opposite end of said circuit breaker passingthrough an aperture in said base and being secured to the oppositeflange of said Z-member.

5. In an electric bell, a base formed of pressed sheet-metal having amarginal rearwardly-extending flange surrounding the same withlaterallyprojecting perforated ears forming securing means, said basealso having a depressed panel cut away at one point, an electro-magnetmounted on the depressed panel of said base, an armature for saidmagnet, and a resilient vibrator adjacent to said armature mounted inrear of said base and extending through the aperture in said depressedpanel into operative relation to said armature.

6. In an electric bell, a base formed of pressed sheet-metal having amarginal rearwardly-extending flange thereabout with laterally extendingperforated ears forming securing means therefor, said base having adepressed panel apertured at one point, an electro-magnet mounted onsaid depressed panel including a Zshaped member with the operativerelation to the poles of the magnet, and a vibrator mounted on therearwardly-extending portion of said Z-member and extending through saidaperture into operative relation to said armature.

7. In an electric bell, the combination with a base formed of pressedsheet metal with an extension at one end thereof, of a bell mounted onsaid extensioma U-shaped member forming a mounting for said bell andhaving an end portion thereof engaging a slot in said extension toprevent turning, a striker in an operative relation to the bell, andelectro-magnetic means for actuating the striker.

8. In an electric bell, the combination with a base member, of a magnetcomprisin parallel core members, windings there or, a magnetic supportfor said core members engaging corresponding ends thereof, magnetic"bridge between the opposite ends of said core members, mounted in saidbridge and support, an armature mounted on said striker arranged outsideof said non-magnetic bridge, a returnbent flange on said armature, and aresilient L HOD:

a striker jointlycircuit-breaker extending between said are mature andthe return-bent portion thereof, the opposite ends of saidcircuit-breaker passing through an aperture in the base and beingsecured therebeneath.

In testimony whereof I aflix my signature.

CARL J. SCHWARZE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner 'of Patents,

Washington, D. G."

